air distribution duct adapter

[texasredneck]

hi,
can anybody tell me where the air distribution duct adapter goes in my gmc sierra grande truck from 1980?i know it has something to do with my airco...
in the classic industries catalog:
"commonly broken or missing part designed to allow the air distribution duct to attach properly.
it looks like this:


in the classic industries catalog T2006
page 132 heater/ac dash parts

my e mail address : [e-mail]

[Pontiac1976]

Not sure what the pic's look like. Oh you still need this. You got to edit the pic tags again.

[texasredneck]

hi pontiac,

i know now where it goes, it's a little round plastic breather that was used until '77 or something . it clicks in the airduct that is under the steering wheel, newer models have a square opening (that is left open)in that place, like mine.